isci: unify isci_request and scic_sds_request

They are one in the same object so remove the distinction.  The near
duplicate fields (owning_controller, and isci_host) will be cleaned up
after the scic_sds_contoller isci_host unification.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/port.h b/drivers/scsi/isci/port.h
index a44e541..668f3a1 100644
--- a/drivers/scsi/isci/port.h
+++ b/drivers/scsi/isci/port.h
@@ -354,17 +354,17 @@
 enum sci_status scic_sds_port_link_down(struct scic_sds_port *sci_port,
 					struct scic_sds_phy *sci_phy);
 
-struct scic_sds_request;
+struct isci_request;
 struct scic_sds_remote_device;
 enum sci_status scic_sds_port_start_io(
 	struct scic_sds_port *sci_port,
 	struct scic_sds_remote_device *sci_dev,
-	struct scic_sds_request *sci_req);
+	struct isci_request *ireq);
 
 enum sci_status scic_sds_port_complete_io(
 	struct scic_sds_port *sci_port,
 	struct scic_sds_remote_device *sci_dev,
-	struct scic_sds_request *sci_req);
+	struct isci_request *ireq);
 
 enum sas_linkrate scic_sds_port_get_max_allowed_speed(
 	struct scic_sds_port *sci_port);